What is the smallest unit of heredity?
The nitrogen bases in DNA are bonded to the
DNA replication is semiconservative because the _______ strand will become half of the _______ molecule.
In DNA, adenine is the complementary base for ______ , and cytosine is the complement for ______.
The base pairs are held together primarily by
Why must the lagging strand of DNA be replicated in short pieces?
|A)||because of limited space|
|B)||otherwise, the helix will become distorted|
|C)||the DNA polymerase can synthesize in only one direction|
|D)||to make proofreading of code easier|
Messenger RNA is formed by ______ of a gene on the DNA template strand.
Transfer RNA is the molecule that
|A)||contributes to the structure of ribosomes|
|B)||adapts the genetic code to protein structure|
|C)||transfers the DNA code to mRNA|
|D)||provides the master code for amino acids|
As a general rule, the template strand on DNA will always begin with
The lac operon is usually in the ______ position and is activated by a/an ______ molecule.
The repressible operon is important in regulating.
|A)||amino acid synthesis|
For mutations to have an effect on populations of microbes, they must be
|C)||a and b|
|D)||all of the above|
Which of the following characteristics is not true of a plasmid?
|A)||it is a circular piece of DNA|
|B)||it is required for normal cell function|
|C)||it is found in bacteria|
|D)||it can be transferred from cell to cell|
Which genes can be transferred by all three methods of intermicrobial transfer?
Which of the following would occur through specialized transduction?
|A)||acquisition of Hfr plasmid|
|B)||transfer of genes for toxin production|
|C)||transfer of genes for capsule formation|
|D)||transfer of a plasmid with genes for degrading pesticides|